Pressure-gage.



C. l. FILLING.

PRESSURE GAGE. APPL|cAT1oN-HLED APnJzs, 1912'.

l Patented Nov. l14, 1916.

INVENTCR ATTORNEY inirrnii sfraarns manier 'onirica CHARLES J. PLLING, 011" PHILADELPHIA, PENNSYLVANIA.

PRESSURE-GAGE.

maaien.

Specification of Letters Patent.

Patenten nov. ia, icio.

Application filed April 25, 1912. Serial No. 693,014,

' ing drawings, forming a partlof this specification.

My invention relates to air-pressure gages,

adapted more particularly for measuring and indicating, with great accuracy, maxivmuni pressures and variations thereof in surgical apparatus wherein compressed air is the motive or actuating force employed.

My invented device involves to a great extent the principles of construction and opf eration of that heretofore invented jointly by Dr. Francis Ashley Faught and myself and which forms the subject of our ll. S. Patent No. 10891-22 dated March 3,1914; the object of the present invention being to simplify and improve sonic elements olt that apparatus and malte the operation more perfeet.

To these ends my iniprovcd apparatus' consists of the novel features hereinafter set forth and pointed out in. the appended claims.

ln the drawings illustrating my invention, Figure l is an elevation of the complete device, Fig. 2 a section on line or' Fi g. 3; Fig. 3 a section on line 3--3 of Fig. l; Fig. 4 an enlarged plan vieu' of the dial easing with the dial-plate and glass cover removed, and the bellows chamber also removed. Fig. 5 is an' enlarged sectional view, similar to Fig. with the bellows chamber removed,l

and showing' the dial-spindle operating mechanism in full, including elements shown in Fig. 4. Fig. 6 is a section on the lii'ie lill of F i g. el, j'

Referring now to said drawings, the dialcasing l of the apparatus is shown'therein as a shallow cylindrical box, composed of :i baseplate and a. peripheralivall having an interior annular groove 5 formed therein; the otherwise open top of the casing being closed by the dial and dial-carrying cap, which latter forms a most important eature'ot the yinoprovenient and will be first describe-d herein. Said dialscasing l operatively supports and incloses the mechanism hereinafter described, which directly actuates a rotatable spindle 2 carrying the dial-pointer. Hence the function sought in the dial-carrying element is the provision of relative rotative adjustability ot the. dial and the ,rotatable dial pointer carried by said spindle. This is ei?- fected by making said dial-carrying element .in the forni ol a closing cap for the casing l; and it consists of'a. ring-like iii-ame G hav- ,ing a depending flange 3 ol' lesser diameter,

said flange being provided exteriorly with an annular bead l adapted to register rota tably ivith the groove 5 in the perpeiidiculai' periphery oi? the casing 1. The flange therefore extends ivithin the casing and the cap iframe G rests upon the upper edge of its peripheral wall. This construction oi' the frame (i also provides an oifset on and by which to iixedly support and carry a diskshaped scale-marked dial plate 8. The cap 'frame (i grooved interiorly, as at 7, in order to insert therein the riin edge ot a convexed glass disk l0, thereby covering the dial-plate. 8 and movable pointer 12, and

holding said dial-plate. lixedly in the cap f tured to adniit the projecting end of the rol .iraine (l. rl`he dial plate. 5% is centrally apertatahle spindle Q, hence the vpointer l cai'- ried b v said spindle has tree n'ioveinent in a plane over the normally fixed dial; while 'iotatal'ilo i'uoveinent for adji'istnienlI vrelatively to the. pointer. 'when the latter is in a state of rest, is readily ellected' by a more` nient of the dial-carryingcap-traine (i within the casing wall, through the medium of the coacting bead 4- and groove beiore descrilicd. i

The construction described is best shown in detached and enlarged sectional view Fig. 5, from which it will be seen that as the dial plate and its glass covering are iixedly mounted in the cap G, and the dial pointer and. its rotatable actiuitiug spindle-are operatively independent thereof, a.' rotative movement ot' the cap in the groove 5 of the casing', will carry with it 'the dial plate,

' bringing its Zero niark in register with the spindle and mechanism projecting end of said spindle and adapted to be rotatably moved thereby.

3. A pressure-gage of the class recited, comprising in combination an open-topped cylindrical casing which is annularly grooved interiorly, a rotatably mounted to impart such moj tion thereto, operatively 4mounted in said casing, a closing cap consisting of an annular body portion interiorly grooved and having a depending flange of lesser diameter provided with an exterior annular bead adapted to register rotatably with said interior annular groove in the 4casing, a scalemarked dial-plate centrally apertured and supported on said flange of the cap, a glass disk over said dial-plate iXedly held by its rim in said interior annular groove in the cap, and a dial-pointer mounted on the projecting end of said spindle and adapted to be rotatably moved thereby.

4. In a pressure-gage, the combination of a casing, a dial-plate, a rotatable spindle, a dial pointer carried bv the spindle adjacent to the dial-plate, a gear Wheel, means Whereby the gear wheel is caused to vturn said spindle. a post on said gear Wheel and having a guide opening therein, a member adjustable in said guide opening toward and from the center of saidr Wheel, means to secure said member to .said post in different positions of adjustment, pressure mechanism having a pressure operated movable part, and a link connecting said member and said part.

5. In a pressure gage, the combination o1e a casing, a dial-plate, a rotatable spindle, a dial pointer carried by the spindle adjacent to the dial-plate, a gear Wheel, means whereby the gear Wheel is caused to turn said spindie, a post on said gear Wheel and having a guide opening therein, a member adjustable in said guide opening towardand from the center of said Wheel, means operative to adjust said member relatively to said post, pressure mechanism having a pressure operated movable part, and a link connecting said member and said part.

6. In a pressure gage, the combination of a casing, a dial-plate, a rotatable spindle, a dial pointer carried by the spindle adjacent to the dial-plate, a gear Wheel provided with means to cause it to turn said spindle, a recessed post on said gear Wheeland having a guide opening therein, a screw-threaded member adjustable in said guide opening toward and from the center of said Wheel, -a screw threaded Wheel engaging the recess of said post and the screw 'threads of said member and operative to adjust said member relatively to said post, pressure mecha nism having a pressure operated movable part, and a link connecting said member and said part.

7. A pressure gage of the class rec1ted compr1s1ng 1n combination a dial casing having a hanged opening in its peripheralvports opposite thereto, said casmg being mounted'vvithin and supported by the flange of the dial casing and hence transverselydisposed relatively to and directly communicating through its coinciding apertured end With the interior of said dial casing, collapsible means in said pressure chamber adapted to be actuated by variations of airpressure therein, a rod reciprocated directly by said collapsible means and extending into the flanged opening of the dial casing, and a connecting member to communicate .movement imparted by the rod to the dial pointer actuating devices.

In testimony whereof l have hereunto affixed my signature this fifteenth day of April, A. D. 1912.

CHARLES J. FILLING. 

